/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/loop-lit/cggmp2005b.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 15:02:07,912 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 15:02:07,917 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 15:02:07,978 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 15:02:07,979 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 15:02:07,986 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 15:02:07,988 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 15:02:07,994 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 15:02:07,997 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 15:02:08,004 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 15:02:08,006 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 15:02:08,009 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 15:02:08,009 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 15:02:08,013 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 15:02:08,016 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 15:02:08,018 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 15:02:08,019 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 15:02:08,022 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 15:02:08,032 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 15:02:08,035 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 15:02:08,037 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 15:02:08,038 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 15:02:08,040 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 15:02:08,042 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 15:02:08,055 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 15:02:08,055 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 15:02:08,056 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 15:02:08,058 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 15:02:08,059 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 15:02:08,060 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 15:02:08,061 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 15:02:08,061 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 15:02:08,064 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 15:02:08,064 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 15:02:08,065 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 15:02:08,066 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 15:02:08,066 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 15:02:08,067 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 15:02:08,067 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 15:02:08,068 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 15:02:08,069 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 15:02:08,076 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-28 15:02:08,119 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 15:02:08,120 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 15:02:08,121 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 15:02:08,121 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 15:02:08,122 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 15:02:08,122 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 15:02:08,122 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 15:02:08,122 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 15:02:08,123 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 15:02:08,123 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 15:02:08,123 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 15:02:08,123 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 15:02:08,123 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 15:02:08,124 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 15:02:08,124 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 15:02:08,124 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 15:02:08,124 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 15:02:08,124 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 15:02:08,125 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 15:02:08,125 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 15:02:08,125 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 15:02:08,125 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 15:02:08,126 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 15:02:08,126 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 15:02:08,126 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 15:02:08,126 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 15:02:08,126 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 15:02:08,126 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 15:02:08,127 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 15:02:08,127 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 15:02:08,511 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 15:02:08,543 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 15:02:08,546 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 15:02:08,548 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 15:02:08,549 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 15:02:08,550 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/cggmp2005b.i [2020-10-28 15:02:08,643 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/752d96966/5e2be377ec8d4fbd89c7df79e9a0c5a0/FLAGefa1ecd37 [2020-10-28 15:02:09,384 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 15:02:09,386 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-lit/cggmp2005b.i [2020-10-28 15:02:09,395 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/752d96966/5e2be377ec8d4fbd89c7df79e9a0c5a0/FLAGefa1ecd37 [2020-10-28 15:02:09,713 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/752d96966/5e2be377ec8d4fbd89c7df79e9a0c5a0 [2020-10-28 15:02:09,716 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 15:02:09,723 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 15:02:09,725 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 15:02:09,725 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 15:02:09,729 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 15:02:09,730 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 03:02:09" (1/1) ... [2020-10-28 15:02:09,734 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6da745d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:02:09, skipping insertion in model container [2020-10-28 15:02:09,734 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 03:02:09" (1/1) ... [2020-10-28 15:02:09,743 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 15:02:09,760 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 15:02:09,935 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 15:02:09,946 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 15:02:09,965 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 15:02:09,982 INFO L208 MainTranslator]: Completed translation [2020-10-28 15:02:09,982 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:02:09 WrapperNode [2020-10-28 15:02:09,983 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 15:02:09,984 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 15:02:09,984 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 15:02:09,985 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 15:02:09,998 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:02:09" (1/1) ... [2020-10-28 15:02:09,998 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:02:09" (1/1) ... [2020-10-28 15:02:10,006 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:02:09" (1/1) ... [2020-10-28 15:02:10,007 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:02:09" (1/1) ... [2020-10-28 15:02:10,013 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:02:09" (1/1) ... [2020-10-28 15:02:10,018 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:02:09" (1/1) ... [2020-10-28 15:02:10,021 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:02:09" (1/1) ... [2020-10-28 15:02:10,023 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 15:02:10,024 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 15:02:10,024 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 15:02:10,025 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 15:02:10,026 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:02:09" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 15:02:10,109 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 15:02:10,110 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 15:02:10,110 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 15:02:10,110 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 15:02:10,110 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-28 15:02:10,110 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 15:02:10,111 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 15:02:10,111 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 15:02:10,111 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-28 15:02:10,111 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-28 15:02:10,111 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 15:02:10,111 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 15:02:10,112 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 15:02:10,112 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-28 15:02:10,112 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 15:02:10,112 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 15:02:10,112 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 15:02:10,112 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 15:02:10,113 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 15:02:10,113 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 15:02:10,113 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 15:02:10,113 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 15:02:10,650 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 15:02:10,651 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-28 15:02:10,654 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 03:02:10 BoogieIcfgContainer [2020-10-28 15:02:10,654 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 15:02:10,658 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 15:02:10,658 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 15:02:10,662 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 15:02:10,662 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 03:02:09" (1/3) ... [2020-10-28 15:02:10,663 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5274a21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 03:02:10, skipping insertion in model container [2020-10-28 15:02:10,663 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:02:09" (2/3) ... [2020-10-28 15:02:10,664 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5274a21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 03:02:10, skipping insertion in model container [2020-10-28 15:02:10,664 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 03:02:10" (3/3) ... [2020-10-28 15:02:10,666 INFO L111 eAbstractionObserver]: Analyzing ICFG cggmp2005b.i [2020-10-28 15:02:10,681 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 15:02:10,686 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 15:02:10,703 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 15:02:10,744 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 15:02:10,744 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 15:02:10,745 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 15:02:10,745 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 15:02:10,745 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 15:02:10,745 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 15:02:10,745 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 15:02:10,745 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 15:02:10,799 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-10-28 15:02:10,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-28 15:02:10,805 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:02:10,806 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:02:10,806 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:02:10,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:02:10,821 INFO L82 PathProgramCache]: Analyzing trace with hash -1037759019, now seen corresponding path program 1 times [2020-10-28 15:02:10,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:02:10,854 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [448430883] [2020-10-28 15:02:10,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:02:11,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:11,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:11,191 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:11,192 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-28 15:02:11,192 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:02:11,192 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 152 [2020-10-28 15:02:11,195 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:11,195 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:11,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:02:11,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:02:11,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:02:11,196 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 15:02:11,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:02:11,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:11,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:11,298 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:11,298 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:02:11,298 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:02:11,299 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-28 15:02:11,299 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:11,299 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:11,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:02:11,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:02:11,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:02:11,300 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:11,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:02:11,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [448430883] [2020-10-28 15:02:11,315 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 15:02:11,315 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 15:02:11,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175247399] [2020-10-28 15:02:11,321 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-28 15:02:11,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:02:11,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-28 15:02:11,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 15:02:11,340 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 3 states. [2020-10-28 15:02:11,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:02:11,411 INFO L93 Difference]: Finished difference Result 45 states and 61 transitions. [2020-10-28 15:02:11,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-28 15:02:11,414 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2020-10-28 15:02:11,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:02:11,425 INFO L225 Difference]: With dead ends: 45 [2020-10-28 15:02:11,426 INFO L226 Difference]: Without dead ends: 17 [2020-10-28 15:02:11,430 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 15:02:11,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-10-28 15:02:11,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-10-28 15:02:11,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-28 15:02:11,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2020-10-28 15:02:11,478 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 13 [2020-10-28 15:02:11,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:02:11,478 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2020-10-28 15:02:11,479 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-28 15:02:11,479 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2020-10-28 15:02:11,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-28 15:02:11,479 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:02:11,480 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:02:11,480 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 15:02:11,480 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:02:11,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:02:11,481 INFO L82 PathProgramCache]: Analyzing trace with hash -1005561992, now seen corresponding path program 1 times [2020-10-28 15:02:11,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:02:11,482 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1761466900] [2020-10-28 15:02:11,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:02:11,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:11,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:11,578 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:11,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-28 15:02:11,579 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:02:11,579 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 79 [2020-10-28 15:02:11,579 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:11,579 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:11,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 15:02:11,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:02:11,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 15:02:11,580 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:02:11,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:02:11,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:11,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:11,641 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:11,642 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:02:11,642 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:02:11,642 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 15:02:11,642 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:11,643 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:11,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:02:11,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:02:11,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:02:11,643 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:11,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:02:11,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1761466900] [2020-10-28 15:02:11,651 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 15:02:11,651 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 15:02:11,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80289839] [2020-10-28 15:02:11,653 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 15:02:11,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:02:11,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 15:02:11,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 15:02:11,654 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 4 states. [2020-10-28 15:02:11,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:02:11,753 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2020-10-28 15:02:11,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 15:02:11,753 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-10-28 15:02:11,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:02:11,754 INFO L225 Difference]: With dead ends: 25 [2020-10-28 15:02:11,755 INFO L226 Difference]: Without dead ends: 18 [2020-10-28 15:02:11,756 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 15:02:11,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-28 15:02:11,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-10-28 15:02:11,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-28 15:02:11,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2020-10-28 15:02:11,766 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 13 [2020-10-28 15:02:11,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:02:11,766 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2020-10-28 15:02:11,766 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 15:02:11,766 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2020-10-28 15:02:11,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-28 15:02:11,767 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:02:11,767 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:02:11,768 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 15:02:11,768 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:02:11,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:02:11,769 INFO L82 PathProgramCache]: Analyzing trace with hash -82641078, now seen corresponding path program 1 times [2020-10-28 15:02:11,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:02:11,769 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1607390508] [2020-10-28 15:02:11,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:02:11,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:11,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:11,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:11,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:12,228 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:12,229 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-28 15:02:12,229 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:02:12,229 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 445 [2020-10-28 15:02:12,230 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:12,230 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:12,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 15:02:12,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:02:12,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 15:02:12,231 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 15:02:12,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:02:12,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:12,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:12,304 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:12,305 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:02:12,305 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:02:12,305 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 15:02:12,306 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:12,306 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:12,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:02:12,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:02:12,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:02:12,307 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:02:12,312 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:02:12,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1607390508] [2020-10-28 15:02:12,313 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:02:12,313 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 15:02:12,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323843208] [2020-10-28 15:02:12,314 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 15:02:12,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:02:12,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 15:02:12,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 15:02:12,316 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 5 states. [2020-10-28 15:02:12,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:02:12,475 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2020-10-28 15:02:12,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 15:02:12,476 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-10-28 15:02:12,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:02:12,477 INFO L225 Difference]: With dead ends: 29 [2020-10-28 15:02:12,477 INFO L226 Difference]: Without dead ends: 22 [2020-10-28 15:02:12,478 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-28 15:02:12,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-28 15:02:12,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-10-28 15:02:12,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-28 15:02:12,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2020-10-28 15:02:12,487 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 17 [2020-10-28 15:02:12,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:02:12,488 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2020-10-28 15:02:12,488 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 15:02:12,488 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2020-10-28 15:02:12,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-28 15:02:12,489 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:02:12,489 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:02:12,489 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 15:02:12,490 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:02:12,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:02:12,490 INFO L82 PathProgramCache]: Analyzing trace with hash 502885916, now seen corresponding path program 2 times [2020-10-28 15:02:12,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:02:12,491 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1550754305] [2020-10-28 15:02:12,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:02:12,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:12,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:12,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:12,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:12,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:12,736 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:12,736 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-28 15:02:12,736 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 15:02:12,737 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 235 [2020-10-28 15:02:12,737 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:12,737 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:12,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 15:02:12,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:02:12,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-28 15:02:12,738 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:12,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:02:12,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:12,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:12,784 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:12,784 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:02:12,784 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:02:12,785 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:02:12,785 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:12,785 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:12,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:02:12,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:02:12,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:02:12,786 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:12,790 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 15:02:12,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1550754305] [2020-10-28 15:02:12,791 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 15:02:12,791 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 15:02:12,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668257929] [2020-10-28 15:02:12,791 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 15:02:12,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:02:12,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 15:02:12,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 15:02:12,796 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 4 states. [2020-10-28 15:02:12,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:02:12,881 INFO L93 Difference]: Finished difference Result 37 states and 45 transitions. [2020-10-28 15:02:12,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 15:02:12,881 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-10-28 15:02:12,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:02:12,882 INFO L225 Difference]: With dead ends: 37 [2020-10-28 15:02:12,882 INFO L226 Difference]: Without dead ends: 23 [2020-10-28 15:02:12,883 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 15:02:12,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-28 15:02:12,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-10-28 15:02:12,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-28 15:02:12,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2020-10-28 15:02:12,890 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 21 [2020-10-28 15:02:12,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:02:12,891 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2020-10-28 15:02:12,891 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 15:02:12,891 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2020-10-28 15:02:12,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-28 15:02:12,892 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:02:12,892 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:02:12,892 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 15:02:12,892 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:02:12,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:02:12,893 INFO L82 PathProgramCache]: Analyzing trace with hash -282874925, now seen corresponding path program 1 times [2020-10-28 15:02:12,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:02:12,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1399846557] [2020-10-28 15:02:12,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:02:12,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:12,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:12,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:12,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:12,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:13,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:13,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:13,631 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:13,632 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-28 15:02:13,632 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 15:02:13,632 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 728 [2020-10-28 15:02:13,632 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:13,632 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:13,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 15:02:13,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:02:13,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-28 15:02:13,633 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:13,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:02:13,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:13,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:13,684 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:13,685 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:02:13,685 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:02:13,685 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:02:13,685 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:13,686 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:13,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:02:13,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:02:13,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:02:13,686 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:13,690 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 15:02:13,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1399846557] [2020-10-28 15:02:13,691 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:02:13,691 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 15:02:13,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009476813] [2020-10-28 15:02:13,692 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 15:02:13,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:02:13,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 15:02:13,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 15:02:13,704 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 6 states. [2020-10-28 15:02:13,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:02:13,881 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2020-10-28 15:02:13,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 15:02:13,882 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-10-28 15:02:13,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:02:13,883 INFO L225 Difference]: With dead ends: 34 [2020-10-28 15:02:13,883 INFO L226 Difference]: Without dead ends: 27 [2020-10-28 15:02:13,883 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 15:02:13,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-28 15:02:13,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-10-28 15:02:13,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-28 15:02:13,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2020-10-28 15:02:13,891 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 22 [2020-10-28 15:02:13,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:02:13,891 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2020-10-28 15:02:13,891 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 15:02:13,891 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2020-10-28 15:02:13,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-28 15:02:13,892 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:02:13,892 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:02:13,893 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 15:02:13,893 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:02:13,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:02:13,893 INFO L82 PathProgramCache]: Analyzing trace with hash 157199909, now seen corresponding path program 2 times [2020-10-28 15:02:13,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:02:13,894 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [433203268] [2020-10-28 15:02:13,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:02:13,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:13,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:13,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:13,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:13,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:13,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:14,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:14,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:14,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:14,747 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:14,747 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-28 15:02:14,748 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 15:02:14,752 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 844 [2020-10-28 15:02:14,752 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:14,752 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:14,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 15:02:14,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:02:14,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 15:02:14,753 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:14,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:02:14,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:14,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:14,813 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:14,813 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:02:14,813 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:02:14,813 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:02:14,813 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:14,814 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:14,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:02:14,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:02:14,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:02:14,827 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 13 [2020-10-28 15:02:14,833 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 15:02:14,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [433203268] [2020-10-28 15:02:14,834 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:02:14,834 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 15:02:14,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316087841] [2020-10-28 15:02:14,835 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 15:02:14,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:02:14,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 15:02:14,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 15:02:14,836 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand 7 states. [2020-10-28 15:02:15,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:02:15,066 INFO L93 Difference]: Finished difference Result 38 states and 46 transitions. [2020-10-28 15:02:15,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 15:02:15,066 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2020-10-28 15:02:15,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:02:15,068 INFO L225 Difference]: With dead ends: 38 [2020-10-28 15:02:15,068 INFO L226 Difference]: Without dead ends: 31 [2020-10-28 15:02:15,068 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2020-10-28 15:02:15,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-28 15:02:15,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-10-28 15:02:15,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-28 15:02:15,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 39 transitions. [2020-10-28 15:02:15,077 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 39 transitions. Word has length 26 [2020-10-28 15:02:15,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:02:15,077 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 39 transitions. [2020-10-28 15:02:15,078 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 15:02:15,078 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 39 transitions. [2020-10-28 15:02:15,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-28 15:02:15,079 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:02:15,079 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:02:15,079 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 15:02:15,079 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:02:15,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:02:15,080 INFO L82 PathProgramCache]: Analyzing trace with hash -1362348169, now seen corresponding path program 3 times [2020-10-28 15:02:15,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:02:15,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2062990115] [2020-10-28 15:02:15,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:02:15,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:15,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:15,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:15,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:15,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:15,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:15,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:15,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:15,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:15,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:15,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:16,458 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:16,458 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-28 15:02:16,458 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-28 15:02:16,458 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1366 [2020-10-28 15:02:16,459 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:16,459 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:16,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 15:02:16,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:02:16,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-28 15:02:16,459 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:16,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:02:16,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:16,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:16,535 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:16,535 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:02:16,535 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:02:16,536 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:02:16,536 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:16,536 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:16,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:02:16,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:02:16,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:02:16,537 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:16,541 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 15:02:16,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2062990115] [2020-10-28 15:02:16,542 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:02:16,542 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 15:02:16,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675817815] [2020-10-28 15:02:16,544 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 15:02:16,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:02:16,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 15:02:16,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 15:02:16,545 INFO L87 Difference]: Start difference. First operand 31 states and 39 transitions. Second operand 8 states. [2020-10-28 15:02:16,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:02:16,790 INFO L93 Difference]: Finished difference Result 42 states and 52 transitions. [2020-10-28 15:02:16,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 15:02:16,791 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 30 [2020-10-28 15:02:16,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:02:16,792 INFO L225 Difference]: With dead ends: 42 [2020-10-28 15:02:16,792 INFO L226 Difference]: Without dead ends: 35 [2020-10-28 15:02:16,793 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2020-10-28 15:02:16,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-28 15:02:16,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-10-28 15:02:16,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-28 15:02:16,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2020-10-28 15:02:16,810 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 30 [2020-10-28 15:02:16,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:02:16,810 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2020-10-28 15:02:16,810 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 15:02:16,810 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2020-10-28 15:02:16,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-28 15:02:16,814 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:02:16,814 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:02:16,814 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 15:02:16,815 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:02:16,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:02:16,815 INFO L82 PathProgramCache]: Analyzing trace with hash 1691404233, now seen corresponding path program 4 times [2020-10-28 15:02:16,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:02:16,816 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1775030436] [2020-10-28 15:02:16,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:02:16,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:16,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:16,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:16,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:16,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:16,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:16,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:16,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:16,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:16,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:16,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:16,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:17,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:18,569 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:18,569 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-28 15:02:18,569 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 15:02:18,569 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1739 [2020-10-28 15:02:18,570 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:18,570 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:18,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 15:02:18,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:02:18,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 15:02:18,570 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:18,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:02:18,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:18,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:18,619 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:18,620 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:02:18,620 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:02:18,620 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:02:18,620 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:18,620 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:18,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:02:18,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:02:18,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:02:18,621 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:18,626 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 13 proven. 22 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-28 15:02:18,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1775030436] [2020-10-28 15:02:18,627 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:02:18,627 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 15:02:18,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385341092] [2020-10-28 15:02:18,627 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 15:02:18,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:02:18,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 15:02:18,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-28 15:02:18,629 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand 6 states. [2020-10-28 15:02:18,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:02:18,773 INFO L93 Difference]: Finished difference Result 62 states and 82 transitions. [2020-10-28 15:02:18,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 15:02:18,774 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 34 [2020-10-28 15:02:18,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:02:18,775 INFO L225 Difference]: With dead ends: 62 [2020-10-28 15:02:18,775 INFO L226 Difference]: Without dead ends: 40 [2020-10-28 15:02:18,775 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-28 15:02:18,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-28 15:02:18,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-10-28 15:02:18,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-28 15:02:18,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 52 transitions. [2020-10-28 15:02:18,784 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 52 transitions. Word has length 34 [2020-10-28 15:02:18,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:02:18,785 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 52 transitions. [2020-10-28 15:02:18,785 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 15:02:18,785 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 52 transitions. [2020-10-28 15:02:18,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-28 15:02:18,786 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:02:18,786 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:02:18,786 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 15:02:18,787 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:02:18,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:02:18,787 INFO L82 PathProgramCache]: Analyzing trace with hash -1209798258, now seen corresponding path program 5 times [2020-10-28 15:02:18,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:02:18,788 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [731302434] [2020-10-28 15:02:18,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:02:18,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:18,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:18,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:18,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:18,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:18,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:18,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:18,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:18,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:18,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:18,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:19,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:19,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:19,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:21,643 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:21,644 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-28 15:02:21,644 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-28 15:02:21,644 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2847 [2020-10-28 15:02:21,644 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:21,644 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:21,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 15:02:21,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 15:02:21,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-28 15:02:21,645 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:21,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:02:21,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:21,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:21,683 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:21,684 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:02:21,684 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:02:21,684 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:02:21,684 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:21,684 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:21,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:02:21,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:02:21,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:02:21,685 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:21,690 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-28 15:02:21,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [731302434] [2020-10-28 15:02:21,690 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 15:02:21,690 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 15:02:21,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415094019] [2020-10-28 15:02:21,692 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 15:02:21,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:02:21,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 15:02:21,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 15:02:21,700 INFO L87 Difference]: Start difference. First operand 40 states and 52 transitions. Second operand 4 states. [2020-10-28 15:02:21,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:02:21,757 INFO L93 Difference]: Finished difference Result 63 states and 83 transitions. [2020-10-28 15:02:21,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 15:02:21,759 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 35 [2020-10-28 15:02:21,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:02:21,760 INFO L225 Difference]: With dead ends: 63 [2020-10-28 15:02:21,760 INFO L226 Difference]: Without dead ends: 36 [2020-10-28 15:02:21,763 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 15:02:21,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-28 15:02:21,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-10-28 15:02:21,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-28 15:02:21,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2020-10-28 15:02:21,773 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 35 [2020-10-28 15:02:21,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:02:21,773 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2020-10-28 15:02:21,773 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 15:02:21,773 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2020-10-28 15:02:21,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-28 15:02:21,778 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:02:21,778 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:02:21,780 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 15:02:21,780 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:02:21,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:02:21,781 INFO L82 PathProgramCache]: Analyzing trace with hash -1770206350, now seen corresponding path program 6 times [2020-10-28 15:02:21,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:02:21,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [300663597] [2020-10-28 15:02:21,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:02:21,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:21,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:21,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:21,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:21,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:21,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:21,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:21,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:23,564 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:23,566 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-28 15:02:23,566 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 15:02:23,566 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1772 [2020-10-28 15:02:23,567 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:23,567 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:23,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 15:02:23,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:02:23,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-28 15:02:23,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:23,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:02:23,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:23,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:23,640 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:23,641 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:02:23,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:02:23,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 15:02:23,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:23,641 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:23,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:02:23,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:02:23,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:02:23,642 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:23,649 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 13 proven. 15 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-10-28 15:02:23,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [300663597] [2020-10-28 15:02:23,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:02:23,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 15:02:23,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083262947] [2020-10-28 15:02:23,651 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 15:02:23,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:02:23,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 15:02:23,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-28 15:02:23,652 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand 7 states. [2020-10-28 15:02:23,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:02:23,871 INFO L93 Difference]: Finished difference Result 63 states and 75 transitions. [2020-10-28 15:02:23,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 15:02:23,872 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 35 [2020-10-28 15:02:23,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:02:23,873 INFO L225 Difference]: With dead ends: 63 [2020-10-28 15:02:23,875 INFO L226 Difference]: Without dead ends: 37 [2020-10-28 15:02:23,876 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-10-28 15:02:23,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-28 15:02:23,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-10-28 15:02:23,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-28 15:02:23,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2020-10-28 15:02:23,887 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 35 [2020-10-28 15:02:23,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:02:23,888 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2020-10-28 15:02:23,888 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 15:02:23,888 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2020-10-28 15:02:23,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-28 15:02:23,891 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:02:23,891 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:02:23,891 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 15:02:23,891 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:02:23,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:02:23,892 INFO L82 PathProgramCache]: Analyzing trace with hash -1705952023, now seen corresponding path program 7 times [2020-10-28 15:02:23,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:02:23,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2111279651] [2020-10-28 15:02:23,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:02:23,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:23,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:23,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:23,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:24,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:24,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:24,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:24,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:24,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:25,987 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:25,987 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-28 15:02:25,987 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 15:02:25,988 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2075 [2020-10-28 15:02:25,988 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:25,988 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:25,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 15:02:25,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:02:25,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 15:02:25,989 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:26,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:02:26,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:26,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:26,065 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:26,066 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:02:26,066 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:02:26,066 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:02:26,066 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:26,066 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:26,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:02:26,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:02:26,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:02:26,067 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:26,074 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 13 proven. 22 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-10-28 15:02:26,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2111279651] [2020-10-28 15:02:26,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:02:26,075 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 15:02:26,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202587304] [2020-10-28 15:02:26,076 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 15:02:26,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:02:26,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 15:02:26,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-28 15:02:26,078 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand 8 states. [2020-10-28 15:02:26,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:02:26,360 INFO L93 Difference]: Finished difference Result 64 states and 76 transitions. [2020-10-28 15:02:26,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 15:02:26,361 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 36 [2020-10-28 15:02:26,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:02:26,362 INFO L225 Difference]: With dead ends: 64 [2020-10-28 15:02:26,362 INFO L226 Difference]: Without dead ends: 38 [2020-10-28 15:02:26,363 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-10-28 15:02:26,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-28 15:02:26,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-10-28 15:02:26,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-28 15:02:26,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2020-10-28 15:02:26,379 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 36 [2020-10-28 15:02:26,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:02:26,379 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2020-10-28 15:02:26,379 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 15:02:26,379 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2020-10-28 15:02:26,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-28 15:02:26,380 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:02:26,380 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:02:26,380 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 15:02:26,381 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:02:26,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:02:26,382 INFO L82 PathProgramCache]: Analyzing trace with hash 285932114, now seen corresponding path program 8 times [2020-10-28 15:02:26,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:02:26,383 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [928163217] [2020-10-28 15:02:26,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:02:26,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:26,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:26,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:26,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:26,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:26,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:26,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:26,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:26,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:29,392 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:29,392 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-28 15:02:29,392 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 15:02:29,392 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2997 [2020-10-28 15:02:29,393 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:29,394 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:29,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 15:02:29,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-10-28 15:02:29,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 15:02:29,394 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:02:29,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:02:29,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:02:29,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:02:29,501 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:02:29,502 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:02:29,502 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:02:29,502 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 15:02:29,502 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:02:29,502 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:02:29,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:02:29,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:02:29,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:02:29,503 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:02:29,513 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2020-10-28 15:02:29,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [928163217] [2020-10-28 15:02:29,514 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 15:02:29,514 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 15:02:29,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630103862] [2020-10-28 15:02:29,515 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 15:02:29,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:02:29,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 15:02:29,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 15:02:29,516 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand 6 states. [2020-10-28 15:02:29,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:02:29,669 INFO L93 Difference]: Finished difference Result 59 states and 71 transitions. [2020-10-28 15:02:29,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 15:02:29,669 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 37 [2020-10-28 15:02:29,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:02:29,670 INFO L225 Difference]: With dead ends: 59 [2020-10-28 15:02:29,670 INFO L226 Difference]: Without dead ends: 0 [2020-10-28 15:02:29,671 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-28 15:02:29,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-28 15:02:29,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-28 15:02:29,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-28 15:02:29,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-28 15:02:29,672 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 37 [2020-10-28 15:02:29,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:02:29,672 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-28 15:02:29,672 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 15:02:29,672 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-28 15:02:29,672 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-28 15:02:29,672 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 15:02:29,675 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-28 15:02:30,051 INFO L274 CegarLoopResult]: For program point reach_errorEXIT(line 12) no Hoare annotation was computed. [2020-10-28 15:02:30,051 INFO L277 CegarLoopResult]: At program point reach_errorENTRY(line 12) the Hoare annotation is: true [2020-10-28 15:02:30,051 INFO L274 CegarLoopResult]: For program point L12-1(line 12) no Hoare annotation was computed. [2020-10-28 15:02:30,051 INFO L274 CegarLoopResult]: For program point L12-2(line 12) no Hoare annotation was computed. [2020-10-28 15:02:30,052 INFO L274 CegarLoopResult]: For program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2020-10-28 15:02:30,052 INFO L274 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-10-28 15:02:30,052 INFO L270 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string0.offset| |old(#t~string0.offset)|) (= |old(#length)| |#length|) (= |#t~string1.base| |old(#t~string1.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string0.base| |old(#t~string0.base)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|) (= |#t~string1.offset| |old(#t~string1.offset)|)) [2020-10-28 15:02:30,052 INFO L274 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-10-28 15:02:30,052 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-28 15:02:30,052 INFO L277 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-10-28 15:02:30,052 INFO L277 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-10-28 15:02:30,053 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-28 15:02:30,053 INFO L274 CegarLoopResult]: For program point L15(line 15) no Hoare annotation was computed. [2020-10-28 15:02:30,053 INFO L274 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 14 16) no Hoare annotation was computed. [2020-10-28 15:02:30,053 INFO L274 CegarLoopResult]: For program point L15-2(lines 14 16) no Hoare annotation was computed. [2020-10-28 15:02:30,053 INFO L274 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 14 16) no Hoare annotation was computed. [2020-10-28 15:02:30,053 INFO L270 CegarLoopResult]: At program point L35-2(lines 35 37) the Hoare annotation is: (and (< 19 main_~j~0) (= main_~k~0 4)) [2020-10-28 15:02:30,053 INFO L270 CegarLoopResult]: At program point L35-3(lines 29 38) the Hoare annotation is: (or (and (< 19 main_~j~0) (= main_~k~0 4)) (and (<= (+ main_~j~0 100) main_~i~0) (<= main_~i~0 0))) [2020-10-28 15:02:30,053 INFO L270 CegarLoopResult]: At program point L31-2(lines 31 33) the Hoare annotation is: (or (and (< 19 main_~j~0) (= main_~k~0 4)) (<= main_~i~0 1)) [2020-10-28 15:02:30,053 INFO L274 CegarLoopResult]: For program point L31-3(lines 31 33) no Hoare annotation was computed. [2020-10-28 15:02:30,054 INFO L270 CegarLoopResult]: At program point L29-2(lines 29 38) the Hoare annotation is: (and (< 19 main_~j~0) (= main_~k~0 4)) [2020-10-28 15:02:30,054 INFO L274 CegarLoopResult]: For program point mainEXIT(lines 24 41) no Hoare annotation was computed. [2020-10-28 15:02:30,054 INFO L274 CegarLoopResult]: For program point mainFINAL(lines 24 41) no Hoare annotation was computed. [2020-10-28 15:02:30,054 INFO L277 CegarLoopResult]: At program point mainENTRY(lines 24 41) the Hoare annotation is: true [2020-10-28 15:02:30,054 INFO L274 CegarLoopResult]: For program point L39(line 39) no Hoare annotation was computed. [2020-10-28 15:02:30,054 INFO L274 CegarLoopResult]: For program point L18-2(lines 17 22) no Hoare annotation was computed. [2020-10-28 15:02:30,054 INFO L277 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 17 22) the Hoare annotation is: true [2020-10-28 15:02:30,054 INFO L274 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 17 22) no Hoare annotation was computed. [2020-10-28 15:02:30,055 INFO L270 CegarLoopResult]: At program point L19(line 19) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2020-10-28 15:02:30,055 INFO L274 CegarLoopResult]: For program point L18(lines 18 20) no Hoare annotation was computed. [2020-10-28 15:02:30,055 INFO L274 CegarLoopResult]: For program point L19-1(line 19) no Hoare annotation was computed. [2020-10-28 15:02:30,073 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 03:02:30 BoogieIcfgContainer [2020-10-28 15:02:30,074 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-28 15:02:30,076 INFO L168 Benchmark]: Toolchain (without parser) took 20357.16 ms. Allocated memory was 162.5 MB in the beginning and 425.7 MB in the end (delta: 263.2 MB). Free memory was 138.5 MB in the beginning and 267.2 MB in the end (delta: -128.7 MB). Peak memory consumption was 135.5 MB. Max. memory is 8.0 GB. [2020-10-28 15:02:30,077 INFO L168 Benchmark]: CDTParser took 0.58 ms. Allocated memory is still 162.5 MB. Free memory is still 133.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-28 15:02:30,078 INFO L168 Benchmark]: CACSL2BoogieTranslator took 258.50 ms. Allocated memory is still 162.5 MB. Free memory was 137.9 MB in the beginning and 128.6 MB in the end (delta: 9.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-10-28 15:02:30,078 INFO L168 Benchmark]: Boogie Preprocessor took 39.00 ms. Allocated memory is still 162.5 MB. Free memory was 128.6 MB in the beginning and 127.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-28 15:02:30,079 INFO L168 Benchmark]: RCFGBuilder took 629.90 ms. Allocated memory is still 162.5 MB. Free memory was 127.0 MB in the beginning and 113.5 MB in the end (delta: 13.5 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2020-10-28 15:02:30,080 INFO L168 Benchmark]: TraceAbstraction took 19416.12 ms. Allocated memory was 162.5 MB in the beginning and 425.7 MB in the end (delta: 263.2 MB). Free memory was 112.9 MB in the beginning and 267.2 MB in the end (delta: -154.3 MB). Peak memory consumption was 109.3 MB. Max. memory is 8.0 GB. [2020-10-28 15:02:30,083 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.58 ms. Allocated memory is still 162.5 MB. Free memory is still 133.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 258.50 ms. Allocated memory is still 162.5 MB. Free memory was 137.9 MB in the beginning and 128.6 MB in the end (delta: 9.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 39.00 ms. Allocated memory is still 162.5 MB. Free memory was 128.6 MB in the beginning and 127.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 629.90 ms. Allocated memory is still 162.5 MB. Free memory was 127.0 MB in the beginning and 113.5 MB in the end (delta: 13.5 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 19416.12 ms. Allocated memory was 162.5 MB in the beginning and 425.7 MB in the end (delta: 263.2 MB). Free memory was 112.9 MB in the beginning and 267.2 MB in the end (delta: -154.3 MB). Peak memory consumption was 109.3 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 12]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 35]: Loop Invariant Derived loop invariant: 19 < j && k == 4 - InvariantResult [Line: 31]: Loop Invariant Derived loop invariant: (19 < j && k == 4) || i <= 1 - InvariantResult [Line: 29]: Loop Invariant Derived loop invariant: (19 < j && k == 4) || (j + 100 <= i && i <= 0) - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 31 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 18.9s, OverallIterations: 12, TraceHistogramMax: 5, AutomataDifference: 2.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.3s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 202 SDtfs, 225 SDslu, 213 SDs, 0 SdLazy, 419 SolverSat, 83 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 114 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 1.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=40occurred in iteration=8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 12 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 46 PreInvPairs, 70 NumberOfFragments, 75 HoareAnnotationTreeSize, 46 FomulaSimplifications, 590 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 11 FomulaSimplificationsInter, 344 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 16.2s InterpolantComputationTime, 319 NumberOfCodeBlocks, 319 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 307 ConstructedInterpolants, 0 QuantifiedInterpolants, 27571 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 12 InterpolantComputations, 5 PerfectInterpolantSequences, 246/361 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...